Count of all nulls in a Table

Hi all,
Is there a way to find out the count of all the null fields in a table?
One way is obvious:-
SQL> select * from test6152;
         A B   DD
         1 one <null>
         2 two <null>
         3 tri <null>
         3 dri <null>
         1 <nu 01-JAN-08
           ll>
         1 ch 01-JAN-08
6 rows selected.
SQL> select a + b + c from
2 (
3 select sum(case when a is null then 1 else 0 end) a ,
4 sum(case when b is null then 1 else 0 end) b ,
5 sum(case when dd is null then 1 else 0 end) c
6 from
7 test6152
8 )
9 /
     A+B+C
         5
.Is there any other viable way to find the count of null fields in a table with say 80 fields.??
Thanks in advance.

You solution is already a good one.
I personally would prefer "decode" instead of "case" in the case. but that's only a matter of style.
DECODE(a,null,1,0)Another possibility is first to string all rows together and count the number of nulls in that row. Then add everything up.
E.g. (not tested!)
SELECT SUM(
                LENGTH(
                             decode(a,null,'x','')
                          || decode(b,null,'x','')
                          || decode(c,null,'x','')
                          || decode(d,null,'x','')
FROM test6152

Similar Messages

Count the all null values in the given table

Suppose a table has n number of rows and columns .
can any one tell the query to count the number of null values present in the table.
For example :
select * from tname:
A      B
cc    jhghf
hff      -
-       kjh
tys     -
-        gyrfg
jjgg      -
jfgh      -
-        uytg
10 rows selected..
now to count the null vales in the table we can use --->   select count(1)-count(a)+count(2)-count(b) as ncount from tname;
                                                                                  o/p:
                                                                                          ncount
                                                                                           11
now my questions is we have n number of columns now pls tel tell me how to count the nulls present in table..?
Thanks in Advance.

Object[][] o;
int tot = 0;
for(int x = 0 ; x < o.length ; x++)
   tot += o[x].length;
}If it's not a jagged array, however, this would be easier:
int tot = o.length * o[0].length;

Sqlldr - getting all nulls in target table

Database: 10gR2 on WinXP
I am trying to load about 4000 of 7.5 million lines into the database from a 390MB file (there are 1522 of these files in total).
Goal:
1. When the line starts with "ScanHeader" or "position = ", just insert the line into TEST1.
2. When the line starts with "packet #", break it up into columns and insert into TEST2.
In fact, I only want three values out of the line. For example, for the line:
"Packet # 2, intensity = 0.000000, mass/position = 50.250000"
I want "2", "0.000000", and "50.250000" to be inserted into a table (and only if the intensity (the second value) is greater than 25).
(Note: I was thinking I would just load them all and then delete the ones I don't want, but if there is a way to exclude them up front, I would love to see it).
The loading into TEST1 seems to be working, but my first several stabs at loading into TEST2 results in the correct number of rows with source_file and seq set properly, but NULL for all the other columns. I suspect this is probably an easy one, but the correct search terms are eluding me.
My rust-encrusted loader skills were somewhat limited in the first place, so any suggestions beyond fixing the main issue are appreciated.
Thanks!
-Tom
CONTROL FILE:
OPTIONS(DIRECT=TRUE, ROWS=100000)
UNRECOVERABLE
LOAD DATA
INFILE '081017102.txt'
BADFILE '081017102.bad'
TRUNCATE
INTO TABLE TEST1
WHEN (1:10) = 'ScanHeader'
(source_file constant '011017102.txt',
content position(1:200) char,
SEQ recnum)
INTO TABLE TEST1
WHEN (1:10) = 'position ='
(source_file constant '011017102.txt',
content position(1:200) char,
SEQ recnum)
INTO TABLE TEST2
WHEN (1:8) = 'Packet #'
fields terminated by ' '
trailing nullcols
(source_file constant '011017102.txt',
seq recnum,
fpacket,
fpoundsign,
packet_number,
fintensity,
fequals1,
fcontent,
fmplabel,
fequals2,
mp
SAMPLE DATA FROM ONE FILE (partial file):
RunHeaderInfo
dataset_id = 0, instrument_id = 0
first_scan = 1, last_scan = 318, start_time = 0.002282, end_time = 0.997597
low_mass = 50.000000, high_mass = 1000.000000, max_integ_intensity = 41286.089844, sample_volume = 0.000000
sample_amount = 0.000000, injected_volume = 0.000000, vial = 0, inlet = 0
err_flags = 0, sw_rev = 1
Operator =
Acq Date =
comment1 =
comment2 =
acqui_file =
inst_desc =
sample volume units =
sample amount units =
Injected volume units =
Packet Position = 38630
Spectrum Position = 14603130
ScanHeader # 1
position = 1, start_mass= 50.000000, end_mass = 1000.000000
start_time = 0.002282, end_time = 0.000000, packet_type = 0
num_readings = 11400, integ_intens = 15376.646484, data packet pos = 0
uScanCount = 0, PeakIntensity = 1098.594238, PeakMass = 75.333328
Scan Segment = 0, Scan Event = 0
Precursor Mass
Collision Energy
Isolation width
Polarity negative, Profile Data, Full Scan Type, MS Scan
SourceFragmentation Off, Type Ramp, Values = 0, Mass Ranges = 0
Turbo Scan Off, IonizationMode Electrospray, Corona Any
Detector Any, Value = 0.00, ScanTypeIndex = -1
DataPeaks
Packet # 0, intensity = 0.000000, mass/position = 50.083333
saturated = 0, fragmented = 0, merged = 0
Packet # 1, intensity = 0.000000, mass/position = 50.166667
saturated = 0, fragmented = 0, merged = 0
Packet # 2, intensity = 0.000000, mass/position = 50.250000
saturated = 0, fragmented = 0, merged = 0
(...11,900 more packets for each of 220 ScanHeaders...)
LOG FILE FROM LOADING A PARTIAL FILE:
SQL*Loader: Release 10.2.0.1.0 - Production on Tue Oct 21 11:24:11 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Control File: pos.ctl
Data File: 081017102.txt
Bad File: 081017102.bad
Discard File: none specified
(Allow all discards)
Number to load: ALL
Number to skip: 0
Errors allowed: 50
Continuation: none specified
Path used: Direct
Silent options: FEEDBACK and DISCARDS
Load is UNRECOVERABLE; invalidation redo is produced.
Table TEST1, loaded when 1:10 = 0X5363616e486561646572(character 'ScanHeader')
Insert option in effect for this table: TRUNCATE
Column Name Position Len Term Encl Datatype
SOURCE_FILE CONSTANT
Value is '011017102.txt'
CONTENT 1:200 200 CHARACTER
SEQ RECNUM
Table TEST2, loaded when 1:8 = 0X5061636b65742023(character 'Packet #')
Insert option in effect for this table: TRUNCATE
TRAILING NULLCOLS option in effect
Column Name Position Len Term Encl Datatype
SOURCE_FILE CONSTANT
Value is '011017102.txt'
SEQ RECNUM
FPACKET NEXT * WHT CHARACTER
FPOUNDSIGN NEXT * WHT CHARACTER
PACKET_NUMBER NEXT * WHT CHARACTER
FINTENSITY NEXT * WHT CHARACTER
FEQUALS1 NEXT * WHT CHARACTER
FCONTENT NEXT * WHT CHARACTER
FMPLABEL NEXT * WHT CHARACTER
FEQUALS2 NEXT * WHT CHARACTER
MP NEXT * WHT CHARACTER
Table TEST1, loaded when 1:10 = 0X706f736974696f6e203d(character 'position =')
Insert option in effect for this table: TRUNCATE
Column Name Position Len Term Encl Datatype
SOURCE_FILE CONSTANT
Value is '011017102.txt'
CONTENT 1:200 200 CHARACTER
SEQ RECNUM
Table TEST1:
1 Row successfully loaded.
0 Rows not loaded due to data errors.
34234 Rows not loaded because all WHEN clauses were failed.
0 Rows not loaded because all fields were null.
Table TEST2:
11400 Rows successfully loaded.
0 Rows not loaded due to data errors.
22835 Rows not loaded because all WHEN clauses were failed.
0 Rows not loaded because all fields were null.
Table TEST1:
1 Row successfully loaded.
0 Rows not loaded due to data errors.
34234 Rows not loaded because all WHEN clauses were failed.
0 Rows not loaded because all fields were null.
Bind array size not used in direct path.
Column array rows : 5000
Stream buffer bytes: 256000
Read buffer bytes:20971520
Total logical records skipped: 0
Total logical records read: 34235
Total logical records rejected: 0
Total logical records discarded: 22833
Total stream buffers loaded by SQL*Loader main thread: 5
Total stream buffers loaded by SQL*Loader load thread: 0
Run began on Tue Oct 21 11:24:11 2008
Run ended on Tue Oct 21 11:24:12 2008
Elapsed time was: 00:00:01.09
CPU time was: 00:00:00.10

I don't think that is the issue, but thanks for the suggestion.
I eliminated the directives to load data into TEST1 from the control file and then, surprise surprise, the load into TEST2 started working. I added the TEST1 directives back in after the TEST2 directive and all appears to be working now. I don't understand exactly why, but at this point I will accept the result.
I have changed the control file to what you see below. For the TEST2 load, any suggestions on how to skip the records where the intensity is less than 25?
REVISED CONTROL FILE:
OPTIONS(DIRECT=TRUE, ROWS=100000)
UNRECOVERABLE
LOAD DATA
INFILE '081017102-partial.txt'
BADFILE '081017102.bad'
TRUNCATE
INTO TABLE TEST2
WHEN (1:8) = 'Packet #'
fields terminated by ' '
trailing nullcols
(source_file constant '011017102',
seq recnum,
fpacket filler,
fpoundsign filler,
packet_number "replace(:packet_number, ',', '')",
fintensity filler,
fequals1 filler,
intensity "replace(:intensity, ',', '')",
fmplabel filler,
fequals2 filler,
mass_position
INTO TABLE TEST1
WHEN (1:10) = 'ScanHeader'
(source_file constant '011017102',
content position(1:200) char,
SEQ recnum)
INTO TABLE TEST1
WHEN (1:10) = 'position ='
(source_file constant '011017102',
content position(1:200) char,
SEQ recnum)

Count(*) for all tables

Hi ,
I want the Query to get the table name and count(*) display in excel like this.Can i get count(*) from metadata table .Please let me know ??
ACCT 53
ACCT_CHEQUE 45
EMP 50
DEPT 90

Karthick_Arp wrote:
A XML solution.
This one is not mine. This question comes up often in this forum. And once i saw this answer. And i thought its really cool so just saved it in my Google Note Book ;)You need to update your google note book. It doesn't take account of Index Organised Tables.
Based on answer from Laurent Schneider
http://laurentschneider.com/wordpress/2007/04/how-do-i-store-the-counts-of-all-tables.html
SQL> select
2    table_name,
3    to_number(
4      extractvalue(
5        xmltype(
6 dbms_xmlgen.getxml('select count(*) c from '||table_name))
7        ,'/ROWSET/ROW/C')) count
8 from user_tables
9 where iot_type != 'IOT_OVERFLOW';
TABLE_NAME                      COUNT
DEPT                                4
EMP                                14
BONUS                               0
SALGRADE                            5Edited by: BluShadow on Jul 8, 2009 12:00 PM

Update table all null values to 0 single query

hi dear ;
How Can I do , update table all null values to 0 using single query or procedure

declare @tableName nvarchar(100)
declare @querys varchar(max)
set @querys = ''
set @tableName = 'YOUR TABLE NAME HERE'
select @querys = @querys + 'update ' + @tableName + ' set ' +
QUOTENAME(t.[name]) + '=0 where ' + QUOTENAME(t.[name]) + ' is null;'
from (SELECT [name] FROM syscolumns
WHERE id = (SELECT id
FROM sysobjects
WHERE type = 'U'
AND [NAME] = @tableName))t
select @querys
execute sp_executesql @sqlQuery
Reference:
http://stackoverflow.com/questions/6130133/sql-server-update-all-null-field-as-0
-Vaibhav Chaudhari
this code is return update TABLE set [FIELD]=isnull([FIELD],''),update TABLE set [FIELD2]=isnull([FIELD2],'')
I want to use UPDATE TABLE SET FIELD1=ISNULL(FIELD1,0),FIELD2=ISNULL(FIELD2,0),FIELD3=ISNULL(FIELD3,0) So CUT another update and set statement .

Get records count of all tables

Hi ,
I am trying to get the record count of all tables using dynamic query. I don't know how to put the value in placeholder. I tried the below code.
SET SERVEROUTPUT ON SIZE 1000000
DECLARE
     CURSOR table_list
     IS
     select OBJECT_NAME from user_objects
     where object_type in ('TABLE')
     and object_name not like '%AUDIT_DDL%'
     AND object_name not like 'MD_%'
     AND object_name not like 'EXT_%'
     AND object_name not like 'STG_%'
     AND object_name not like 'SYS_%'
     AND object_name not like 'TMP_%'
     AND object_name not like 'TEMP_%'
     order by 1;
     v_count     NUMBER :=0;
     query_str VARCHAR2(1000);
BEGIN
     FOR table_name IN table_list
     LOOP
          query_str :='SELECT COUNT(1) FROM ' || table_name.OBJECT_NAME;
dbms_output.put_line(query_str);
          dbms_output.put_line('Table Name:' || table_name.OBJECT_NAME );
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END;
I know I am doing wrong in the bold lines. But not sure how to fix it. Please help. Thanks in advance.

Hi,
Welcome to the forum!
What you posted is basically right, assuming you really want to do dynamic SQL t all.
The only problem with
961618 wrote:
          query_str :='SELECT COUNT(1) FROM ' || table_name.OBJECT_NAME; would be if the object name included special characters (such as single-quotes) or lower-case letters. To avoid any possible problems, I would put the object name inside double-quotes:
...     query_str := 'SELECT COUNT (*) FROM "' || table_name.OBJECT_NAME
                                           || '"';
          v_count:= execute immediate query_str;
The correct syntax is
execute immediate query_str INTO v_count;V_count will be the number of rows in a single table. Keep another variable (say total_v_count) that keeps the total count so far.
Do you really need dynamic SQL?
SELECT     SUM (num_rows)     AS total_rows
FROM     user_tables
WHERE     table_name     NOT_LIKE '%AUDIT_DDL%
AND     ...
;gets the same information, accurate as of the last time statistics were gathered, and some of the numbers may be approximate. Depending on how you use the results, that may be good enough for you. If you actually have 10,000,123 rows, and the query says you have 10,000,000, does it really matter?

Is there a way to match all columns in a table?

Oracle 11.1.0.7:
Is there any way to say match all the columns of Table A with Table B? For eg:
Table A
id
name
Table B
id
name
Is there a way to say match all the columns with similar column in other in a select instead of doing "where A.id = B.id and A.name = b.name"? I am trying to write a compare script to test that replication is indeed doing the right thing.

user628400 wrote:
If 2 columns have null values does it match that too? I'll run some tests.It does
SQL> ed
Wrote file afiedt.buf
1 with a as (select 1 col1, null col2 from dual
2             union all
3             select 2 col1, null col2 from dual
4             union all
5             select null, null from dual),
6       b as (select 1, null from dual
7             union all
8             select null, null from dual)
9 select *
10    from a
11 minus
12 select *
13*   from b
SQL> /
      COL1 C
         2
While I was doing the comparision I found that if column x in Table A has "null" and same column x in table B has "null" and if I do "where A.x = B.x" then it doesn't return the row. I am not sure why. Does "minus" work the same way?That's because NULL will never equal any value (including NULL) and NULL will never not equal any value (including NULL). That is
NULL = 1 is unknown (which maps to false)
NULL = NULL is unknown
NULL != 1 is unknown
NULL != NULL is unknown
If you want to compare columns that may have NULL values, you need to use IS NULL and IS NOT NULL or use the NVL function to map NULL values to a non-NULL but impossible value, i.e.
WHERE (a.x = b.x OR
        (a.x is null and b.x is null))or
WHERE nvl(a.x,-17) = nvl(b.x,-17)assuming that -17 is not a valid value for either a.x or b.x
Justin

Count number of rows in a table

Hi,
I have a requirement. I want to frame a SQL, which takes schema name as input and returns tables owned by that schema and number of rows inside a particular table.
A Sample output:
===========
Table            No. of Rows
~~~~          ~~~~~~~~
A                    123
B                    126
C                    234
.Can somebody help me in framing a query for the same.
Regards,

hoek wrote:
But you could use this script:
http://laurentschneider.com/wordpress/2007/04/how-do-i-store-the-counts-of-all-tables.html
Laurent's solution most likely was published before IOT. Anyway, IOT ovwerflow tables must be excluded. Otherwise:
SQL> select table_name,
2          to_number(
3                    extractvalue(
4                                 xmltype(
5                                         dbms_xmlgen.getxml('select count(*) c from '||owner || '.' || table_name)),'/ROWSET/ROW/C')) cou
6    from dba_tables
7    where owner = 'OE'
8 /
ERROR:
ORA-19202: Error occurred in XML processing
ORA-25191: cannot reference overflow table of an index-organized table
ORA-06512: at "SYS.DBMS_XMLGEN", line 176
ORA-06512: at line 1
no rows selected
SQL> select table_name,
2          to_number(
3                    extractvalue(
4                                 xmltype(
5                                         dbms_xmlgen.getxml('select count(*) c from '||owner || '.' || table_name)),'/ROWSET/ROW/C')) count
6    from dba_tables
7    where owner = 'OE'
8      and nvl(iot_type,'X') != 'IOT_OVERFLOW'
9 /
TABLE_NAME                          COUNT
CUSTOMERS                             319
WAREHOUSES                              9
ORDER_ITEMS                           665
ORDERS                                105
INVENTORIES                          1112
PRODUCT_INFORMATION                   288
PRODUCT_DESCRIPTIONS                 8640
PROMOTIONS                              2
PRODUCT_REF_LIST_NESTEDTAB            288
SUBCATEGORY_REF_LIST_NESTEDTAB         21
10 rows selected.
SQL> SY.

Query in SQL to display count of all records but where condition is present

Hi All,
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Please find the below sample data :
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20110401     AM     1     0
20110401     AM     1     0
20110401     MS     29     0
20110501     MS     1     0
20110601     MS     14     0
20110701     MS     2     0
20110401     MS     1     0
20110401     AM     2     0
20110401     AM     69     0
20110401     AM     2     0
finally I need for type = MS
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I need to use the table single time (ie not self join outer joins )
I have tried to use partition by clause but it will filter out the data .
Cheers,
Sp

842106 wrote:
finally I need for type = MS
i) total is_flag count for all the periods
ii) for period=20110501 what is the mv_count
I need to use the table single time (ie not self join outer joins )
I have tried to use partition by clause but it will filter out the data .
select sum(is_flag) is_flg_count,
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            ) mv_cnt_for_20110501
from your_table
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Hi all,
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Sukanya

Hi,
with
data: count type i.
DESCRIBE TABLE it_table LINES count.
will get the number of entries in a table,
regards,
Stefan Huemer

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Hello,
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Currently, when I migrate data, all (null) values in oracle tables are migrated as NULL to SQL.
However, I want to migrate null values in oracle tables to blank space in SQL.
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Go
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i want to Get count of all EBELN for each SUBMI.
Get EBELN & EBELP from EKPO table.
Get ANFNR from EKPO for the EBELN & pass it in EKKO-EBELN
Get SUBMI from table EKKO for ANFNR = EBELN
Pass the above SUBMI in table EKKO & get all EBELN
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so on.............
please help me..
regards
steve.

Hi sumit,
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Code :
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for (int i=0;i<j;i++)
row=(xxVORowImpl)rowsetiterator.getRowAtRangeIndex(1);
int a=am.getSupplierSitesVO.getRowCount();//this is the view object in the pick list
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this code is giving row count of last row of supplier.
How to get the count for each and every row of supplier sites ?
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Does any one have an idea as to
how to get the record count of all DSOs in one shot?
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Dipali

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      PU_O31                 12421696         21020500              128            13123             0             0      /BIC/B0000310000    607232        1183300        13029056           0                             0      Commitments Line Items in Funds Management (IS-PS)
      ZAP_OTW1         10814208         28065630              128          1091100           128             0      /BIC/B0000608000    957440        2711567        11771904           0           X      20080903110025      Accounts Payable: Treasury Warrant Info
      ZSEM_O51          6937344         17585900              128                0           128             0      /BIC/B0000584000   4678784       12101200        11616384           0           X                   0      Complement Data for Costing
      BBP_PO                   991232                0              128                0           128             0      /BIC/B0000167000       128              0        10116480           0                             0      Purchase Order - Single Documents
      ZCBP_INV          3613696          5889633              128             7167           128             0      /BIC/B0000959000   4551680        6404367         8165632           0           X      20071114161251      COPY OF 0BBP_INV
      ZPU_O51          7032896         14555300              128             2093           128             0      /BIC/B0000352000    160768         392960         7193920           0           X      20080903141737      Budget in Funds Management
      ZSEM_O52          3749952         17608900              128                0           128             0      /BIC/B0000585000   2978944       10656100         6729152           0           X                   0      Complement Cost Data from HRV1018
      ZSLGS_O1          2781184          5666200              128            18360           128             0      /BIC/B0000841000   3241984        6964467         6023424           0           X      20080903145240      FISL: SRM Global Spend Detail
      BBP_DS1          5011456          5870533              128            18070           128             0      /BIC/B0000198000    548864         846330         5560576           0                             0      Actual Value for Purchase Order -Single Documents
      ZIC_O03          4332096          9217400              128            10477           128             0      /BIC/B0000587000     45056          91627         4377408           0                             0      ODS Material Stocks / Movements
      BBP_SC                  1542400          1493100              128            19663           128             0      /BIC/B0000733000    119808         382750         2363904           0                             0      Shopping Cart - Individual Documents
      ZRR_O01           290816           781850              128             1263             0             0      /BIC/B0001007000   1815552        4045433         2106496           0           X      20080211170935      Revenue & Refunds DSO
      BBP_DOC           797184          1359533              128             6978           128             0      /BIC/B0000732000    481280          51307         1278720           0                             0      Document Flow - Single Documents
      BBP_CON          1227776                0              128                0           128             0      /BIC/B0000194000       128              0         1228160           0                             0      Goods/Services Confirmation - Single Documents
      ZAR_O_02           840960          1288300              128            1427           128             0      /BIC/B0000593000    132096         199870          973312           0           X      20080711125812      Accounts Receivable - Customers:Line Item Detail
      SRPO_D1           311296           375290              128             6176             0             0      /BIC/B0001036000    384000         500900          695424           0                             0      Purchase Order History
      ZSLFM_O1           542720          2404400                0                0             0             0      /BIC/B0000666000       128              0          542848           0                             0      Expenditure Estimation - FM                             T
      BBP_INV           461824                0              128                0           128             0      /BIC/B0000196000       128              0          462208           0                             0      Invoice - Single Documents
      ZSL_O3                   458752          2430400                0                0             0             0      /BIC/B0000670000       128              0          458880           0                             0      Expenditure Estimation - SL Data                     T
      ZPM_O51           196928           755080              128                0           128             0      /BIC/B0000894000    159744         703770          356928           0           X      20080507175910      Plant Material Valuation History
      ZGL_O3                   235520          2422767                0                0             0             0      /BIC/B0001041000       128              0          235648           0                             0      Expend Est - GL Svc Dt                                     T
There are DB dictionary views that contain this info as well, some of which is copied ot SAP tables. If you have Oracle DB, look for a table DBSTATTORA.

Need to display null values against table

Hi All,
I have one table in which I only need to display null values along with the rest of columns. for example
ename sal date
scott 2000 15/07/06
Michal
now my query should return---
ename sal date
michal
hare krishna
Alok

Maybe it is something like this?:
michaels> select column_name || ' contains ' ||
       dbms_xmlgen.getxmltype ('select sum(nvl2(' || column_name || ',0,1)) c from ' || table_name ).extract ('//text()').getnumberval() ||
       ' NULL values' null_columns
from cols
where table_name = 'EMP'
   and dbms_xmlgen.getxmltype ('select sum(nvl2(' || column_name || ',0,1)) c from ' || table_name ).extract ('//text()').getnumberval() > 0
NULL_COLUMNS
MGR contains 1 NULL values
COMM contains 10 NULL values

Count of all nulls in a Table

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